Compilare: main.cpp: In function 'int main()': main.cpp:38:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i = s.size();i < s2.size(); i++) | ~~^~~~~~~~~~~ main.cpp:50:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int i = 0;i < ans.size() && nr < 1000; i++) | ~~^~~~~~~~~~~~